From the first days of pregnancy future mothers want to know day on which childbirth will fall. It is possible to calculate this date independently on various terms of pregnancy and in different ways.
Instruction
1. Definition of day of childbirth on day of an ovulation and date of conception. The ovulation occurs in the middle of a menstrual cycle. Calculate the middle of a cycle and add 280 days. Such option of calculation will be more reliable if in the last cycle the sexual intercourse was single. Do not forget that date of conception can not coincide with date of sexual intercourse since spermatozoa can be in a female body several days.
2. Formula Negele. Gynecologists often resort to this way of calculation of date of childbirth. This formula will be more exact for owners, 28 a day regular cycle. Take away of the first day of a cycle three months, then add seven days. For example: the end of periods fell on September 10. Minus three months — June 10. You add 7 days. On June 17 will also be in the approximate afternoon of childbirth.
3. Calculation of day of childbirth by means of ultrasonography. This method is one of the most exact. Having undergone this procedure in the early stages of pregnancy, you will be able to learn its term (to within day), approximate date of conception and date of childbirth.
4. Definition of day of childbirth by carrying out gynecologic survey. Absolutely precisely it is possible to establish the term of pregnancy and approximate date of childbirth, since 3-4 weeks (but not later 12 since each child develops individually). At manual survey of female internal genitals the gynecologist is guided by the size and a shape of a uterus.
5. In cases when it is difficult to determine pregnancy term on early terms, it can be done at the first movements of the child in a womb. Mother feels the real movements of the kid on the 20th week of pregnancy (primipara) or on 18 (povtornorodyashchy). Add to term in the first case 20 weeks and 22 weeks in the second. You receive almost exact date of childbirth. Exceptions when mom feels stir of the kid on the 14 or 16 week meet. Gynecologists skeptically react to it and are inclined to write off such feelings for work of intestines, but there is always a probability that future mom and in the truth is very sensitive. In that case this method will not be exact.